A power quality disturbance source location system and location method

Abstract

The invention relates to a positioning system and a positioning method of a power quality disturbance source. The positioning system includes a power quality management master station and an online power quality monitoring device connected to the master station through Ethernet. Each monitoring point of the line is equipped with a power quality online monitoring device, and the power quality online monitoring devices are connected through Ethernet; when an actual disturbance event occurs in the system, the power quality online monitoring device will record the disturbance event after detecting the disturbance event. The time when the disturbance source occurs, and broadcast to other power quality online monitoring devices in the network via Ethernet to start the disturbance recording system based on this time, and record the sampling data of N cycles before and after N cycles , and send it to the power quality management master station in real time, and establish the system coverage matrix and system direction matrix through the mutual cooperation between various power quality online monitoring devices, and then locate the disturbance source.

Description

technical field [0001] The invention relates to the field of on-line monitoring of power quality pollution sources, in particular to a positioning system and a positioning method for power quality disturbance sources in a power grid. Background technique [0002] In recent years, with the rapid development of the economy, the power load has grown rapidly, and the power load has become increasingly complex and diversified. More and more non-linear, impactful, unbalanced and harmonic-rich application equipment have been connected to the power grid one after another. Different degrees affect the power quality of the power grid. Coupled with imperfect monitoring methods, operation, external interference and various faults, power quality problems have become increasingly prominent. [0003] At present, research hotspots related to power quality in power systems mainly focus on the following aspects: identification and processing of power quality signals, power quality evaluation...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is necessary to rely on manual comparison to locate the disturbance source, and the work efficiency is low.

The disadvantage of this method is that it can only determine the front and rear directions of the disturbance source relative to the monitoring point, and when a power quality event occurs in the power network, it cannot really realize the precise location of the disturbance source (such as locating to a specific line). ), establish a disturbance source location optimization model, and use genetic algorithm to further increase the calculation and storage capacity of the power quality on-line monitoring device

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